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公开(公告)号：US20240317303A1
公开(公告)日：2024-09-26
申请号：US18586845
申请日：2024-02-26
Applicant: DEERE & COMPANY
Inventor： STEFAN BROCKE , FABIAN HARTMANN , ABHIJIT HINGNE
IPC: B62D5/093
CPC classification number: B62D5/093
Abstract: A method for operating a hydrostatic vehicle steering system includes rotationally operating an input shaft via a steering handle, rotary operating a steering dosing valve via an output shaft, the steering dosing valve used for hydraulic actuation of a steering cylinder interacting with steerable vehicle wheels, establishing a releasable rotary connection between the input shaft and the output shaft via a clutch, applying a predefinable steering torque to the output shaft via an actuating drive, automatically assuming a closed clutch position of the clutch under the effect of a restoring spring force in a first operating mode intended for manual steering operation, and bringing the clutch into an open clutch position counter to the effect of the restoring spring force via a controller in a second operating mode intended for autonomous steering operation.
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公开(公告)号：US20230264736A1
公开(公告)日：2023-08-24
申请号：US18062037
申请日：2022-12-06
Applicant: Danfoss Power Solutions ApS
Inventor： Bendt Porskrog
Abstract: A hydraulic steering unit (2) includes a steering unit (2) including a supply port arrangement having a supply port (P) and a return port (T), a working port arrangement having two working ports (LR), a steering valve arrangement having two valve elements (32, 33) arranged in a housing (30, 38, 39) and being moveable in relation to each other to change characteristics of orifices, and a measuring motor (9) arranged in a line between the steering valve arrangement and one of the working ports (LR). A hydraulic steering unit should create similar end stop sealings in both steering directions. To this end, backpressure means are provided generating a backpressure on the measuring motor (9), wherein the backpressure means are controlled by the valve element (32, 33), and friction means (43, 43′) are provided between one of the valve elements (33) and the housing (30, 38, 39) or a rotating part of the measuring motor (9) and the housing (30, 38, 39), respectively.
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公开(公告)号：US20180319432A1
公开(公告)日：2018-11-08
申请号：US15970344
申请日：2018-05-03
Applicant: Danfoss Power Solutions ApS
Inventor： Niels Arbjerg , Charles Anthony Bates , Poul Ennemark , Mogens Frederiksen , Casper Mikael Olesen
Abstract: A hydraulic steering unit (1) is described comprising a supply port arrangement having a pressure port (8) connected to a main flow path (6) and a tank port (T) connected to a tank flow path (7), a working port arrangement having a left working port (L) connected to a left working flow path (9) and a right working port (R) connected to a right working flow path (10), a bridge arrangement (14) of variable orifices having a first left orifice (A2L) connected to the main flow path (6) and to the left working flow path (9), a first right orifice (A2R) connected to the main flow path (6) and to the right working flow path (10), a second left orifice (A3L) connected to the left working flow path (9) and to the tank flow path (7), and a second right orifice (A3R) connected to the right working flow path (10) and to the tank flow path (7). Such a hydraulic steering unit should allow comfortable steering. To this end a measuring motor arrangement is arranged in one of the left working flow path (9) and the right working flow path (10), the measuring motor arrangement (15) having a first measuring motor (16) and a second measuring motor (17).
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公开(公告)号：US20180319430A1
公开(公告)日：2018-11-08
申请号：US15970297
申请日：2018-05-03
Applicant: Danfoss Power Solutions ApS
Inventor： Niels Arbjerg , Charles Anthony Bates , Poul Ennemark , Mogens Frederiksen , Casper Mikael Olesen
Abstract: A hydraulic steering unit (1) is described, said hydraulic steering unit (1) comprising a supply port arrangement having a pressure port (P) connected to a main flow path (3) and a tank port (T) connected to a tank flow path (4), a working port arrangement having a left working port (L) connected to a left working flow path (5) and a right working port (R) connected to a right working flow path (6), a bridge arrangement (14) of variable orifices having a first left orifice (A2L) connected to the main flow path (3) and to the left working flow path (5), a first right orifice (A2R) connected to the main flow path (3) and to the right working flow path (6), a second left orifice (A3L) connected to the left working flow path (5) and to the tank flow path (4), and a second right orifice (A3R) connected to the right working flow path (6) and to the tank flow path (4). Such a hydraulic steering unit should be operated together with a pressure source of fixed displacements. To this end an idle flow path (15) branches off the main flow path (3), wherein a variable idle orifice (An) is arranged in the idle flow path (15), the idle orifice (An) being open in neutral position and closing out of neutral position.
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公开(公告)号：US09926003B2
公开(公告)日：2018-03-27
申请号：US15147078
申请日：2016-05-05
Applicant: Danfoss Power Solutions ApS
Inventor： Bendt Porskrog , Casper Mikael Olesen , Abdul Karim Rahimzai
Abstract: A hydraulic steering unit (3) is disclosed comprising a working port arrangement (L, R) having two working ports (L, R), a supply port arrangement having a high pressure port (P) and a low pressure port (T), a main flow path (7) having a main bleed (A1) and a metering device (8) and being arranged between said high pressure port (P) and said working port arrangement (L, R), an amplification flow path (9) having an amplification bleed (Au) and being arranged between said high pressure port (P) and said working port arrangement (L, R), said main bleed (A1) and said amplification bleed (Au) being controlled together by means of a steering handle (6) and being closed in neutral position of said steering handle (6), and a drain bleed (Ad) which is open in neutral position of said steering handle (6), said drain bleed (Ad) connecting a point (11) upstream said main bleed (A1) and said amplification bleed (Au) to said low pressure port (T).
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Patent Agency Ranking
公开(公告)号：US20170072998A1
公开(公告)日：2017-03-16
申请号：US15123159
申请日：2015-03-05
Applicant: EATON CORPORATION
Inventor： Aaron Kelly KRAHN
Abstract: A steering system for a vehicle includes a fluid pump, an actuator in selective fluid communication with the fluid pump, a hydrostatic steering system and an electro-hydraulic steering system. The hydrostatic steering system includes a fluid controller having a first proportional valve in fluid communication with the fluid pump and a fluid meter in fluid communication with the first proportional valve and the actuator. The electro-hydraulic steering system includes a second proportional valve in selective fluid communication with the fluid pump and the actuator. The second proportional valve is disposed in parallel to the first proportional valve. The electro-hydraulic steering circuit further includes a load-reaction switching valve assembly disposed in series with the first proportional valve of the hydrostatic steering system. The load-reaction switching valve allows fluid communication between the actuator and the fluid controller when the first proportional valve is in a neutral position.
Abstract translation: 用于车辆的转向系统包括流体泵，与流体泵选择性流体连通的致动器，静液压转向系统和电动液压转向系统。 静液压转向系统包括具有与流体泵流体连通的第一比例阀和与第一比例阀和致动器流体连通的流量计的流体控制器。 电动液压转向系统包括与流体泵和致动器选择性流体连通的第二比例阀。 第二比例阀与第一比例阀平行设置。 电动液压转向回路还包括与静液压转向系统的第一比例阀串联布置的负载反应切换阀组件。 当第一比例阀处于中立位置时，负载反应切换阀允许致动器和流体控制器之间的流体连通。
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公开(公告)号：US20160332661A1
公开(公告)日：2016-11-17
申请号：US15147078
申请日：2016-05-05
Applicant: Danfoss Power Solutions ApS
Inventor： Bendt Porskrog , Casper Mikael Olesen , Abdul Karim Rahimzai
Abstract: A hydraulic steering unit (3) is disclosed comprising a working port arrangement (L, R) having two working ports (L, R), a supply port arrangement having a high pressure port (P) and a low pressure port (T), a main flow path (7) having a main bleed (A1) and a metering device (8) and being arranged between said high pressure port (P) and said working port arrangement (L, R), an amplification flow path (9) having an amplification bleed (Au) and being arranged between said high pressure port (P) and said working port arrangement (L, R), said main bleed (A1) and said amplification bleed (Au) being controlled together by means of a steering handle (6) and being closed in neutral position of said steering handle (6), and a drain bleed (Ad) which is open in neutral position of said steering handle (6), said drain bleed (Ad) connecting a point (12) upstream said main bleed (A1) and said amplification bleed (Au) to said low pressure port (T).
Abstract translation: 公开了一种液压转向装置（3），其包括具有两个工作端口（L，R）的工作端口装置（L，R），具有高压端口（P）和低压端口（T）的供应端口装置， 主流路（7），具有主泄漏（A1）和计量装置（8），并且布置在所述高压端口（P）和所述工作端口装置（L，R）之间，放大流路（9） 具有放大泄漏（Au）并且布置在所述高压端口（P）和所述工作端口装置（L，R）之间，所述主泄漏（A1）和所述放大泄漏（Au）通过转向 手柄（6）并且在所述转向手柄（6）的中间位置处于关闭状态，以及在所述转向手柄（6）的中立位置处打开的排泄口（Ad），所述排放流出物（Ad）连接点 ）上游，所述主要泄漏（A1）和所述放大渗出（Au）到所述低压端口（T）。
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公开(公告)号：US09038762B2
公开(公告)日：2015-05-26
申请号：US11714364
申请日：2007-03-06
Applicant: Jan Vernersen , Ove Pedersen , Niels Bjarne Hansen
Inventor： Jan Vernersen , Ove Pedersen , Niels Bjarne Hansen
Abstract: The invention concerns a hydraulic steering (1) with a steering motor (8), a steering unit (2) with feedback behavior, a steering member activating the steering unit (2) and a shock valve arrangement (50) between the steering motor (8) and the steering unit (2). It is endeavored to enable changes of the feedback behavior in a simple manner. For this purpose it is ensured that a switchable feedback suppression device (9) is located at the side of the shock valve arrangement (50) facing away from the steering motor (8).
Abstract translation: 本发明涉及具有转向电动机（8）的液压转向（1），具有反馈特性的转向单元（2），启动转向单元（2）的转向构件和转向电动机之间的冲击阀装置（50） 8）和转向单元（2）。 努力以简单的方式来改变反馈行为。 为此目的，确保可切换反馈抑制装置（9）位于远离转向马达（8）的冲击阀装置（50）侧。
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公开(公告)号：US08997902B2
公开(公告)日：2015-04-07
申请号：US13905521
申请日：2013-05-30
Applicant: CNH America, LLC
Inventor： Todd B. Pierce , Philip J. Ehrhart , Jeffrey Fay, II , Mark D. Layton
CPC classification number: B62D11/005 , B62D5/093 , B62D11/006 , B62D11/04 , Y10T477/10
Abstract: A steering system for a differential steered self-propelled agricultural windrower, windrower speed and direction controlled by adjusting the pivotal position of rotatable pintel arms to control the output of a pair of tandem-mounted hydraulic drive pumps and provide motive power for the windrower. A control input shaft that is both rotatable and axially moveable manages the relative positioning of the pintel arms. A hydraulic steering motor is operably connected to the input shaft. Rotation of the hydraulic steering motor is managed by a steering control valve attached to a cab-mounted windrower steering wheel.
Abstract translation: 一种用于差速转向自行式农业自动上料机的转向系统，通过调节可旋转的叉形臂的枢转位置来控制起落架转速和方向，以控制一对串联式液压驱动泵的输出，并为货轮提供动力。 既可旋转又可轴向移动的控制输入轴可控制臼轴的相对定位。 液压转向马达可操作地连接到输入轴。 液压转向马达的旋转由附接到驾驶室安装的投料机方向盘的转向控制阀来管理。
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10.发明授权Steering control system for hydrostatically driven front vehicle ground wheels and steerable rear caster wheels 有权用于液压驱动前车辆地面车轮和可转向后轮脚轮的转向控制系统公开(公告)号：US08925672B2
公开(公告)日：2015-01-06
申请号：US13681626
申请日：2012-11-20
Applicant: Deere & Company
Inventor： Thomas D. Bebernes , Stephen E. O'Brien
CPC classification number: B62D11/04 , B62D5/093 , B62D11/005
Abstract: An integrated steering control system includes a primary, automatic and rear control valves. A steering wheel operates the primary steering control valve and is of a type which includes a leakage characteristic. Steering wheel movement is sensed and a signal is sent which results in the automatic steering control valve being operated for adding fluid that supplied to a steering cylinder by the primary steering control valve in order to compensate for leakage, the amount of added fluid being a function of vehicle ground speed. An electric actuator with position feedback is used for ground speed control. Whenever the actuator position shows that the ground speed is set to zero and a switch in the hydro-handle slot shows that the handle is in the Park position, the automatic steering control valve is activated to move the steering cylinder to a neutral, straight ahead position, as determined by a sensor in a mechanical linkage of the steering control.
Abstract translation: 一体化的转向控制系统包括一个主，自动和后控制阀。 方向盘操作主转向控制阀，并且是一种包括泄漏特性的类型。 检测到方向盘运动，并且发送信号，导致自动转向控制阀被操作，以便通过主转向控制阀添加供给转向缸的流体，以补偿泄漏，附加流体的量是一个功能 的车速。 具有位置反馈功能的电动执行器用于地面速度控制。 每当执行器位置显示地面速度设置为零，并且水力手柄槽中的开关表示手柄处于停止位置时，自动转向控制阀被启动，以将转向油缸移动到中立的直线前方 位置，由传感器在转向控制的机械联动中确定。
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